Combination solid and liquid fuel range.



' A est: Inventor: m fl A. J. LINDEMANN.

COMBINATION SOLID AND LIQUIDFUEL RANGE. APPLICATION FILED nEcQax. m5.

1,217,098. w Patented Feb. 20,1917.

2 SHEETS-SHEET I.

R Attj A. J. LINDEIVIANN.

COMBINATION SOLID AND LIQUID FUEL RANGE.

APPLICATION FILED DEC.3I,19I5.

1,217,098. Patented Feb.20,1917.

2 SHEETS-SHEET 2.

qgoood OQCOQQ:

- Inventaf:

UNITED sraans PATENT ornion.

ALBERT J. LINDEMANN, 0F MILWAUKEE, WISCONSIN.

COMBINATION SOLID AND LIQUID FUEL RANGE.

To all whom it may concern:

Be it known that I, ALBERT J. LINDE- MANN, a citizen of the United States, and a resident of the city of Milwaukee, in the county of Milwaukee, State of Wisconsin, have invented certain new and useful Improvements in Combination Solid and Liquid Fuel Ranges, of which the following is a specification.

The improvements relate to stoves provided with burners adapted to utilize kerosene or other liquid hydrocarbon as a fuel, but are also in the nature of improvements in coal ranges and the like. The structure range, the parts of both phases of the device being constructed and arranged to ooordinate with each other for the production of a unitary result. Several of the important features of the improvements, however, are capable of separate use, and it is therefore not intended that the claims of this application shall limit them to the combined use except as otherwise expressed.

I am aware that coal ranges have heretofore been rovided with oil burners of various kinds, nd that these burners have been arranged to operate in a common fire pot. These burners have usually been intended for use in sections of country in which crude oil is abundantly available for fuel for heating and cooking purposes, and the oil burners are. constructed and arranged to consume fuel of this character. The present improvements, however, are of a distinctly different species and relate primarily to the utilization of a relatively light'liquid hydrocarbon as a fuelwhich requires certain peculiar structural provisionsseparately or simultaneously with the solid fuel, the two burners, or sets of burners, and their accessories being arranged so that they are not deleteriously affected by each other, but on the contrary contribute in a certain degree and in a certain way to common results.

By the improvements a combination oil and coal stove is produced which has all the advantages of both classes of stoves em Specification of Letters Patent. Patented Feb, 20, 1917 Application filed December 31, 1915. I

Serial No. 69,530.

The improvements consist in the construction and arrangement of parts hereinafter described and claimed, and illustrated in the accompanying drawings, .in which Figure 1 is a front elevation of a range embodying the said improvements; Fig. 2 is an end elevation of the same, certain exterior parts being broken away to expose the interior; Fig. 3 is a plan of a portion of the stove top beneath which a liquid fuel burner is located; Fig. 4 is a vertical section of the same on the line 4-4 of Fig. 3 looking in the direction indicated by the arrows; Fig. 5

is a plan of the oven bottom with parts broken away to expose other parts beneath them.

The range is supported on a suitable base 1, provided with supporting-legs 2, and has a fire-pot 3 and-oven 4, of ordinary con struction. It will be understood that the oven is provided with a suitable rear chimney flue passing over the liquid fuel oven 5 to the chimney, and also the usual fines controlled by suitable dampers for conducting the heated products of combustion around the oven 4, these fines and damper not being. shown.

In the construction shown the oven 5 is heated by burners located above the to of the range, and other burners are locate beneath the top, for the purposes hereinafter described; but the oven may be heated from the lower burners, through a flue communicating therewith, and if desired the two constructions may be combined so that the oven may be heated from the lower burners which has to do principally with the liquid fuel cooking devices. The heating oven 11 is' supported bythese brackets above the solid fuel pot and the top of the range at this part maybe provided with the usual cooking openings and lids.

The oven 5 supported on these brackets is provided with a hin ed door at its vertical front opening an consists essentially of a rectangular frame ofmetal with a bottom 12, rovided with openings 13 at the front an grids 14 over the large openings near the middle thereof. Immediately beneath the oven are burners 15, which are of the wick blue flame type, but may be of. any

other suitable kind. They are mounted on the horizontal oil supply pipe 16 which is in turn supported by the brackets 9 and 10.

The burners 17 are preferably similar to the burners 15 in form and are supported on the branch supply pipe 18 mounted in the hanger bracket 19, which is secured to the end of the range under the overhung portion of the top.' These two sets of burners, it will be observed, are at right angles to each other, the first named being at the back of the stove and the second at one end thereof.

The liquid fuel is supplied to both sets of burners by the reservoir 20, which is preferably of the student lamp type, with a maintained oil level normal with respect to the level of oil in the upper burners 15. The lower receptacle is supported by the supply pipe 16 and the upper reservoir by a ring bracket 21' extending from the bracket 10. c

v The level of oil in the lower burners is maintained by means of the regulator 22 in which preferably a float-operated valve acts to open and close communication with the vertical oil supply pipe 23, when the level in the regulator is below or above the predetermined level of the burners 17 The heated products of combustion from the burners 15 rise and pass into the oven through the chamber 24, entering the oven by the front openings 13. In the baking operation the grid openings are closed by the lids 34, which may be removed whenthese openings are used for broiling or other purposes than baking. The chamber 24 is provided with a hinged door 25 by which it may be opened and closed at the front. At the back thereof and above the burners is a deflector plate 26 extending across the bottom of the oven frame at the back. By this construction the heat of the burners is deflected forward through. the grid openings and the front openings so that it is supplied evenly to all parts of the oven. Small openings 36 in the deflector 26, located between the vertical zones of the burners 15 and at the sides thereof permit the circulationof sufficient heated air to prevent the formation of a dead space and the consequent insulation of the rear bottom of the oven from the heat of the burners. In the rear wall of the oven at this point small orifices 35 are provided, and through these orifices air is permitted to escape slowly from the oven. The door 25 gives access to the compartment 24 for any purpose, as for instance the removal'of particles of food that may fall from the oven to the bottom plate 28, and the sight glasses 27 in the said door permit the user to observe the height of the burner flames, and other conditions.

The burners are isolated from the heat of the stove top by the removable partition 29 which has openings 30 and 31 for burner regulating and adjusting parts 40 and 411 respectively, and a hinged door 32, giving access to the said burners, provided with windows 33, through which they may be observed. This partition protects the burners from heat and drafts, separates them from the stove top and any cooking utensils that may be thereon, tends to direct the heat therefrom in the proper direction and otherwise promotes their efficiency.

In order to make the operative parts of the oil burners removable the lower supply pipe 18 on which the burners 17 are mounted has a nut 39 threaded thereon, on the outside of the bracket 19, and rests in the bottom of an inverted L-slot 42 in the opposite bracket. and the supply pipe 16. on which the burners 15 are mounted, is similarly secured and supported in the brackets 9 and 10. The vertical oil supply pipe 23 is also provided with detachable couplings 37 and 38 at its upper and lower ends respectively. This enables the user to remove the burners with the reservoir, regulator and supply pipes when it is desired to cleanse them or renew them, or for any other purpose, and if it is desired for any reason to operate the range without the oil burners they may be quickly and easily removed.

The grids 44 over the burners 17 are composed of whorled blades 45 which have a tendency. when a plate, cooking vessel or the like is placed thereon, to direct the heated products of combustion laterally in the direction of the opening 46. and the flange 4.? depending from the top surrounds this grid and extends on convergent lines to about the middle of the said opening 46. This flange has the effect of preventing the spreading of the heat radially except in the direction of the said opening: the heat from the burner is further directed by the depending webs 43 which extend from a point over the burner to and through the cooking opening 46 where they spread 'fanlike and finally terminate at the far side of the said opening. The web 48 has an inclined lower edge, which gradually rises as it approaches the far side of the opening 4:6 and thus assists the other parts in directing the heat from the burner to the bottom of a cooking utensil on the said opening. The stove to has a depressed portion 50 at this part 1n the same manner as the bottom of the webs 4:8. in this manner there is provided an auxiliary cooking hole which is particularly useful for simmering and boiling, while the opening immediately above the burner is in use for other purposes. As this auxiliary opening is located over the solid fuel oven of the range it will also be furnished with heat from the solid fuel fire; and the two sources of heat combined will produce a tempera ture suficiently high to maintain boiling and other cooking operations which do not require a more intense degree of heat.

lVhat I claim is:

1. A device of the character described, comprising a stove frame, a fire-pot for solid fuel therein, a liquid fuel burner mounted on the said frame at a point removed from said fire-pot, the said frame having an upper portion extending over the said liquid fuel burner and-an opening over the said burner in said extending portion, said frame also provided with another opening arranged to receive heat from either heat source and in substantially the same horizontal plane as the first named opening and spaced therefrom, and a heat conduit extending from the second mentioned opening to a point above said burner, and means for imparting to heat rising from said burner concentric movement and directing it toward said second mentioned opening.

2. The combination of a stove frame, a liquid fuel burner mounted thereon, said frame having an upper portion extending over-the said burner and an opening over said burner, said'upper portion also having another opening laterally removed from the opening over the burner and a heat conduit extending from the liquid openingto a point in proximity to the otheropening, concentrically disposed members between the burner and the opening above the burner and a shield partly surrounding said opening, but open on the side to which the said heat conduit leads.

3. The combination of a stove casing, a

pot for solid fuel fire therein, a liquid fuel burner mounted above the frame at one side thereof and out of vertical line with said fire-pot, and a vertical shield extending from the top of the casing to said burner isolating said liquid fuel burner constructed and located to intercept radiation from the heat of said pot, a flame regulating member connected with said liquid fuel burner and said shield having an opening through which said member extends toward the space above the stove frame, whereby it may be operated from the exterior of'said shield.

4. In a device of the character described, the combination of aliquid fuel reservoir, a plurality of burners in communication therewith and located at different levels, liquid fuel regulators for maintaining the level of liquid fuel in the'said burners, an oven mounted above the burner at the: upper level communicating therewith and extending beyond the same, said oven having openings for the admission of heat from the said burner and the escape thereof, and an inclined deflector adjacent to the said burner and between it and the oven, constructed and arranged to direct heat from the burner lat erally-and in the direction of the openings for the admission of heat to the oven, the said deflector having openings therein out of vertical line with the burner.

5. The combination of a stove casing, a pot for solid fuel fire therein, a liquid fuel burner mounted above the frame at one side thereof and out of vertical line with said fire-pot, and a vertical. shield extending from the top of the casin to said burner isolating said liquid fuel urner constructed and located to intercept radiation from the heat of said pot, a flame regulating member connected with said liquid fuel burner and said shield having an opening through which said member extends toward the space above the stove frame, whereby it may be operated from the exterior of said shield, a plurality of brackets mounted on said casing, an oven supported thereon above the burner and an elevated shelf also supported on said brackets, said shelf, oven and brackets 6X:

tending over a portion of said stove casing.

Witness my hand this 27th day of December, 1915, at the city of Milwaukee, in the county of Milwaukee, and State of Wisconsin.

ALBERT J. LINDEMANN. 

